We are revising the criteria in the Listing of Impairments (the listings) that we use to evaluate Amyotrophic Lateral Sclerosis (ALS). We apply these criteria when you claim benefits based on disability under title II or title XVI of the Social Security Act (the Act). The revision provides that we will find you disabled if you have medical evidence showing that you have ALS. Because of this change, we are also adding guidance about ALS to our listings. We are also adding ALS to the list of specific impairment categories in our regulation that provides for presumptive disability payments under title XVI.